Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1983-07-29
1985-09-03
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
73597, G01F 166
Patent
active
045384690
ABSTRACT:
An intervalometer for determining the arrival time of a bandwidth limited energy pulse employs an integrated threshold arming apparatus and method for conditioning an event recognition circuit. The event recognition circuit, which is typically a zero crossing detector, responds to the conditioning signal for detecting a predetermined event after occurrence of said conditioning signal. The integrated threshold arming circuit employs a signal integration circuit responsive preferably to a rectified signal input, and comparison means for determining when the integrated value crosses a predetermined threshold. A dual threshold implementation can also be employed to further discriminate against false noise signals. The apparatus and method are preferably employed in connection with volumetric flow measurements of turbulent and time-varying fluids by ultrasonic pulse interrogation.
REFERENCES:
patent: 3727143 (1973-04-01), Garrett
patent: 3869915 (1975-03-01), Baumoel
patent: 3954008 (1976-05-01), Yamamoto et al.
patent: 3981191 (1976-09-01), Brown et al.
patent: 4022058 (1977-05-01), Brown
patent: 4080574 (1978-03-01), Loosemore et al.
patent: 4232548 (1980-11-01), Baumoel
Mitsuta, "Sonic Anemometer-Thermometer for Atmospheric Turbulence Measurements", in Flow, Its Measure and Control in Science and Industry, Dowdell (Ed.), vol. I, Part I, pp. 341-344, Instrument Society of America, 1974.
Schmidt, "Acoustical Method for Fast Detection and Measurement of Vortices in Wind Tunnels," ICIASF '75 Record, pp. 216-218, 1975.
Crawford et al, "Multipath Artifact Corrections in Ultrasonic Transmission Tomography", Ultrasonic Imaging, vol. 4, pp. 234-266, 1982.
"Linear Databook", National Semiconductor Corporation, pp. 9-79-9-84, 1982.
Biber et al, "The Polaroid Ultrasonic Ranging System", Audio Engineering Society, pp. 6-7, 1980.
Lynnworth Lawrence C.
Matson James E.
Panametrics, Inc.
Ruehl Charles A.
LandOfFree
Integrated threshold arming method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Integrated threshold arming method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated threshold arming method and apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-607500